* [PATCH] arm64: dts: imx8mp-kontron: Reduce EERAM SPI clock frequency
@ 2026-05-13 13:25 Frieder Schrempf
0 siblings, 0 replies; only message in thread
From: Frieder Schrempf @ 2026-05-13 13:25 UTC (permalink / raw)
To: Conor Dooley, devicetree, Frank Li, Frieder Schrempf, imx,
Krzysztof Kozlowski, linux-arm-kernel, linux-kernel, Rob Herring,
Sascha Hauer, Shawn Guo
Cc: Annette Kobou, Fabio Estevam, Pengutronix Kernel Team
From: Frieder Schrempf <frieder.schrempf@kontron.de>
There is an onboard level shifter for the SPI signals that causes
additional propagation delay and renders the SPI transmission
unreliable at 20 MHz. Reduce the clock frequency to a safe value.
Fixes: 946ab10e3f40 ("arm64: dts: Add support for Kontron OSM-S i.MX8MP SoM and BL carrier board")
Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
---
arch/arm64/boot/dts/freescale/imx8mp-kontron-bl-osm-s.dts | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/freescale/imx8mp-kontron-bl-osm-s.dts b/arch/arm64/boot/dts/freescale/imx8mp-kontron-bl-osm-s.dts
index 0924ac50fd2d..75ae46642782 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-kontron-bl-osm-s.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-kontron-bl-osm-s.dts
@@ -63,7 +63,7 @@ &ecspi2 {
eeram@0 {
compatible = "microchip,48l640";
reg = <0>;
- spi-max-frequency = <20000000>;
+ spi-max-frequency = <16000000>;
};
};
--
2.54.0
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